You might look at a PSL-058 from ModernAire. That particular liner is set up for an inline or exterior blower, but MA also makes liners with integral blowers. I'd think that the 058 with a capable blower in the attic or on the roof, something such as 1200-1400 cfm (less depending on how and what you cook), mounted in a range hood that spans the width of your range by at least three more inches on either side, would be a great setup. Here is a link that might be useful: Modern-Aire Liners

Joe Blow-You will love your Modern Aire hood. We have a 42" 1200 cfm hood over our LaCanche Volnay and it's fantastic. Ours vents directly out the back through a 6" wall. The fan and motor aren't loud at all. We use it almost exclusively at it's lowest setting, unless searing or cooking stir fry. I've never used it at 1200 cfm. It does get loud at higher settings, but it's the movement of the air, not the machine making the noise and there's no getting away from that. One thing I will caution you on. I have propped up one of the metal "fillers" next to the baffles (there's one on each side) with a small piece of wood because it makes a whistling noise if I don't. I never called Modern Aire about it to find out a better solution or why this is happening but you might want to mention it. Despite that, I love the hood and am putting one in my new beach house kitchen this year. I especially like the infinitely variable speed and light controls and how easy it is to remove the baffles to clean them in the DW.

The wrapping will help with vibration carried down the duct sheet metal, but not so much with acoustic noise carried down the air path. The silencer has to be larger than the duct for the same reason that a car muffler has to be larger than its exhaust and tail pipes. The acoustic waves have to be partially delayed to mix with out-of-phase waves to cancel some of the sound, without adding significant pressure loss. An alternative to the silencer for reducing blade tip turbulence is to operate the blower at a lower speed. For the same flow rate, this requires a blower that is larger in diameter than the usual manufacturer matches to desired flow rates. (Compare and or contrast a Casablanca type ceiling fan -- many CFM with no noise.) For kitchen ventilation, I would look into a commercial up-blast blower. These often have a belt drive between the fan part and the motor, and the belt sheave ratios can be changed for various purposes. So a, say, 2200 CFM rated blower operated with a sheaf ratio such that at full power the flow rate is actually only 1200 CFM, or whatever you need, should be considerably quieter than say a Broan 1200 CFM unit operated at full power. There are many up-blast blowers available from commercial ventilation distributors, but determining what you need may be difficult. It would be for me without getting the necessary literature. You may find a source such as Greenheck to be willing to provide some advice over the telephone or someone at a local commercial HVAC outfit. It is also possible (I've never looked into this) that Fantech could provide some low speed in-line blowers that together moved enough air and could be set to be lower in speed. This might be asked of their engineering support via telephone. But I would be surprised if they could do so without exceeding your duct diameter and still interface to the duct without pressure loss issues. Anyway, usually roof installations are easier to access than duct installations when the duct is nestled in the joist space and covered by gypsum.

I recommend you check with the Jenn-Air to see what they recommend for ventilation over your range.